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      "date": "1971/4",
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      "event": "パソコン通信用アナログモデムを開発し販売開始",
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      "event": "米国イリノイ州にSUN CORPORATION OF AMERICAを設立",
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      "source": "有価証券報告書"
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      "importance": 1,
      "event": "Future Dial Inc.に資本参加し設立",
      "source": "有価証券報告書"
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    {
      "date": "2002/3",
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      "event": "日本証券業協会に店頭登録銘柄として登録",
      "source": "有価証券報告書"
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      "event": "ジャスダック証券取引所に株式を上場",
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      "source": "有価証券報告書"
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      "event": "愛知県名古屋市に名古屋本社を開設",
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      "source": "有価証券報告書"
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      "date": "2020/2",
      "importance": 1,
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      "source": "有価証券報告書"
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